Which of the samples shown below are eukaryotic? (I’m obv. not sure if the selected is right.. I need help)

D. A, B, and D

Explanation:

A eukaryotic organism is an organism whose nucleus is enclosed in a nuclear envelope. According to the images, the only organisms/cells that seem to have a nucleus enclosed in such a manner are A, B, and D. Image C doesn't seem to have any obvious nuclear envelope per the definition.

increase soil erosion                                             reduce soil erosion

cattle grazing                                                         hydroseeding

deforestation                                                         contour plowing

                                                                                planting vegetation

plant roots basically hold the top soil

together and stop soil erosion because

in such situation top soil is not removed

during flood but cattle grazing causes

soil erosion because cattle consume the

grasses and herbs and top soil is exposed.

same situation occurs because of

deforestation, the trees and plants are cut

down to expose top soil which causes soil

erosion

not necessarily. higher fitness requires the organism to be reproductive successful. for example, an organism at age 10 with 15 offspring is much more fit than an organism at age 15 with only 5 offspring.